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    <title>Document</title>
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<body>
    <script>
        // 剩余参数
        // ...变量名
        // arr是一个真数组，存的是剩下的实参
        // ...arr只能放在形参位置的最后面
        function getSum(...arr) {
            console.log(arr)
            let c = 0
            arr.forEach((item) => (c += item))
        }
        getSum(3, 4, 5, 6)
        getSum(6, 8, 5, 6, 4, 43, 2)

        function getSum1(a, b, ...arr1) {
            console.log(arr1)
        }
        getSum1(3, 4, 5, 6)
        getSum1(3, 4, 5, 6, 6, 7, 3)
    </script>
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